Jabee, James Gardin (formerly known as P.H.I.L.T.H.Y.), Myk Dyaleks, and producer M Slago are Negro Smiling — and their new EP “Negro Smiling” is feel-good hip-hop that’s ready for prime-time summer listening. The three emcees —from Oklahoma, Michigan and New Jersey, respectively — showcase their eclectic rhyme styles and vivid storytelling over soulful backdrops.